What Does It Mean?

protean

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From our dictionary:pro•te•an

(prO'tE•un, prO•tE'-), —adj.1. readily assuming different forms or characters; extremely variable.
2. changeable in shape or form, as an amoeba.
3. (of an actor or actress) versatile; able to play many kinds of roles.
4. (cap.) of, pertaining to, or suggestive of Proteus.